diff options
Diffstat (limited to 'ext/ipp/sources/ippcp/pcpgfpecverifynr.c')
| -rw-r--r-- | ext/ipp/sources/ippcp/pcpgfpecverifynr.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/ext/ipp/sources/ippcp/pcpgfpecverifynr.c b/ext/ipp/sources/ippcp/pcpgfpecverifynr.c new file mode 100644 index 0000000..2835182 --- /dev/null +++ b/ext/ipp/sources/ippcp/pcpgfpecverifynr.c @@ -0,0 +1,191 @@ +/******************************************************************************* +* Copyright 2016-2018 Intel Corporation +* All Rights Reserved. +* +* If this software was obtained under the Intel Simplified Software License, +* the following terms apply: +* +* The source code, information and material ("Material") contained herein is +* owned by Intel Corporation or its suppliers or licensors, and title to such +* Material remains with Intel Corporation or its suppliers or licensors. The +* Material contains proprietary information of Intel or its suppliers and +* licensors. The Material is protected by worldwide copyright laws and treaty +* provisions. No part of the Material may be used, copied, reproduced, +* modified, published, uploaded, posted, transmitted, distributed or disclosed +* in any way without Intel's prior express written permission. No license under +* any patent, copyright or other intellectual property rights in the Material +* is granted to or conferred upon you, either expressly, by implication, +* inducement, estoppel or otherwise. Any license under such intellectual +* property rights must be express and approved by Intel in writing. +* +* Unless otherwise agreed by Intel in writing, you may not remove or alter this +* notice or any other notice embedded in Materials by Intel or Intel's +* suppliers or licensors in any way. +* +* +* If this software was obtained under the Apache License, Version 2.0 (the +* "License"), the following terms apply: +* +* You may not use this file except in compliance with the License. You may +* obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 +* +* +* Unless required by applicable law or agreed to in writing, software +* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +* +* See the License for the specific language governing permissions and +* limitations under the License. +*******************************************************************************/ + +/* +// Intel(R) Integrated Performance Primitives. Cryptography Primitives. +// +// Context: +// ippsGFpECVerifyNR() +// +*/ + +#include "owndefs.h" +#include "owncp.h" +#include "pcpeccp.h" + +/*F* +// Name: ippsGFpECVerifyNR +// +// Purpose: NR Signature Verification. +// +// Returns: Reason: +// ippStsNullPtrErr NULL == pEC +// NULL == pMsgDigest +// NULL == pRegPublic +// NULL == pSignR +// NULL == pSignS +// NULL == pResult +// NULL == pScratchBuffer +// +// ippStsContextMatchErr illegal pEC->idCtx +// pEC->subgroup == NULL +// illegal pMsgDigestDigest->idCtx +// illegal pRegPublic->idCtx +// illegal pSignR->idCtx +// illegal pSignS->idCtx +// +// ippStsMessageErr 0> MsgDigest +// order<= MsgDigest +// +// ippStsRangeErr SignR < 0 or SignS < 0 +// +// ippStsOutOfRangeErr bitsize(pRegPublic) != bitsize(prime) +// +// ippStsNotSupportedModeErr 1<GFP_EXTDEGREE(pGFE) +// +// ippStsNoErr no errors +// +// Parameters: +// pMsgDigest pointer to the message representative to being signed +// pRegPublic pointer to the regular public key +// pSignR,pSignS pointer to the signature +// pResult pointer to the result: ippECValid/ippECInvalidSignature +// pEC pointer to the ECCP context +// pScratchBuffer pointer to buffer (2 mul_point operation) +// +*F*/ +IPPFUN(IppStatus, ippsGFpECVerifyNR,(const IppsBigNumState* pMsgDigest, + const IppsGFpECPoint* pRegPublic, + const IppsBigNumState* pSignR, const IppsBigNumState* pSignS, + IppECResult* pResult, + IppsGFpECState* pEC, + Ipp8u* pScratchBuffer)) +{ + IppsGFpState* pGF; + gsModEngine* pGFE; + + /* EC context and buffer */ + IPP_BAD_PTR2_RET(pEC, pScratchBuffer); + pEC = (IppsGFpECState*)( IPP_ALIGNED_PTR(pEC, ECGFP_ALIGNMENT) ); + IPP_BADARG_RET(!ECP_TEST_ID(pEC), ippStsContextMatchErr); + IPP_BADARG_RET(!ECP_SUBGROUP(pEC), ippStsContextMatchErr); + + pGF = ECP_GFP(pEC); + pGFE = GFP_PMA(pGF); + IPP_BADARG_RET(1<GFP_EXTDEGREE(pGFE), ippStsNotSupportedModeErr); + + /* test message representative */ + IPP_BAD_PTR1_RET(pMsgDigest); + pMsgDigest = (IppsBigNumState*)( IPP_ALIGNED_PTR(pMsgDigest, ALIGN_VAL) ); + IPP_BADARG_RET(!BN_VALID_ID(pMsgDigest), ippStsContextMatchErr); + IPP_BADARG_RET(BN_NEGATIVE(pMsgDigest), ippStsMessageErr); + + /* test regular public key */ + IPP_BAD_PTR1_RET(pRegPublic); + IPP_BADARG_RET( !ECP_POINT_TEST_ID(pRegPublic), ippStsContextMatchErr ); + IPP_BADARG_RET( ECP_POINT_FELEN(pRegPublic)!=GFP_FELEN(pGFE), ippStsOutOfRangeErr); + + /* test signature */ + IPP_BAD_PTR2_RET(pSignR, pSignS); + pSignR = (IppsBigNumState*)( IPP_ALIGNED_PTR(pSignR, ALIGN_VAL) ); + pSignS = (IppsBigNumState*)( IPP_ALIGNED_PTR(pSignS, ALIGN_VAL) ); + IPP_BADARG_RET(!BN_VALID_ID(pSignR), ippStsContextMatchErr); + IPP_BADARG_RET(!BN_VALID_ID(pSignS), ippStsContextMatchErr); + IPP_BADARG_RET(BN_NEGATIVE(pSignR), ippStsRangeErr); + IPP_BADARG_RET(BN_NEGATIVE(pSignS), ippStsRangeErr); + + /* test result */ + IPP_BAD_PTR1_RET(pResult); + + { + IppECResult vResult = ippECInvalidSignature; + + gsModEngine* pMontR = ECP_MONT_R(pEC); + BNU_CHUNK_T* pOrder = MOD_MODULUS(pMontR); + int orderLen = MOD_LEN(pMontR); + + /* test mesage: msg<order */ + IPP_BADARG_RET((0<=cpCmp_BNU(BN_NUMBER(pMsgDigest), BN_SIZE(pMsgDigest), pOrder, orderLen)), ippStsMessageErr); + + /* test signature value */ + if(!cpEqu_BNU_CHUNK(BN_NUMBER(pSignR), BN_SIZE(pSignR), 0) && + !cpEqu_BNU_CHUNK(BN_NUMBER(pSignS), BN_SIZE(pSignS), 0) && + 0>cpCmp_BNU(BN_NUMBER(pSignR), BN_SIZE(pSignR), pOrder, orderLen) && + 0>cpCmp_BNU(BN_NUMBER(pSignS), BN_SIZE(pSignS), pOrder, orderLen)) { + + int elmLen = GFP_FELEN(pGFE); + int pelmLen = GFP_PELEN(pGFE); + + BNU_CHUNK_T* h1 = cpGFpGetPool(3, pGFE); + BNU_CHUNK_T* h2 = h1+pelmLen; + BNU_CHUNK_T* f = h2+pelmLen; + + IppsGFpECPoint P; + cpEcGFpInitPoint(&P, cpEcGFpGetPool(1, pEC),0, pEC); + + /* P = [d]BasePoint + [c]publicKey */ + ZEXPAND_COPY_BNU(h1, orderLen, BN_NUMBER(pSignS),BN_SIZE(pSignS)); + ZEXPAND_COPY_BNU(h2, orderLen, BN_NUMBER(pSignR),BN_SIZE(pSignR)); + gfec_BasePointProduct(&P, + h1, orderLen, pRegPublic, h2, orderLen, + pEC, pScratchBuffer); + + /* get P.X */ + if(gfec_GetPoint(h1, NULL, &P, pEC)) { + /* x = int(P.x) mod order */ + GFP_METHOD(pGFE)->decode(h1, h1, pGFE); + elmLen = cpMod_BNU(h1, elmLen, pOrder, orderLen); + cpGFpElementPadd(h1+elmLen, orderLen-elmLen, 0); + + /* and recover msg f = (signC -x) mod order */ + ZEXPAND_COPY_BNU(f, orderLen, BN_NUMBER(pMsgDigest),BN_SIZE(pMsgDigest)); + cpModSub_BNU(h1, h2, h1, pOrder, orderLen, h2); + if(GFP_EQ(f, h1, orderLen)) + vResult = ippECValid; + } + + cpEcGFpReleasePool(1, pEC); + cpGFpReleasePool(3, pGFE); + } + + *pResult = vResult; + return ippStsNoErr; + } +} |